execute unless score startCountDown system matches -2147483648..2147483647 run return run clear @a redstone_block[custom_data~{id:"stop_forward"}]
scoreboard players reset startCountDown system
tellraw @a [{"color": "yellow","text": ""},"[",{"selector": "@s","color": "yellow"},"]",{"text": " 取消了任务","color": "red"}]
execute as @a at @s run playsound block.note_block.snare

title @a title ""
title @a subtitle ""
clear @a redstone_block[custom_data~{id:"stop_forward"}]